(57) Ignition apparatus, e.g. for oil burners, comprising an oscillator circuit (20) to
which is connected a transformer with a primary (7,8) and a secondary circuit (12),
the secondary circuit being connected to spark electrodes (13,14). The oscillator
circuit is, for example, connected to an AC mains (1,2) via a rectifier (5) so that
when a rectified half-wave occurs there is operating voltage for the oscillator (20)
which starts high-frequency spark generation. The transformer is implemented such
that close coupling exists between a primary winding part (7) and the secondary winding
(12) and that there is also close coupling between a second primary winding path (8)
and a winding (16) controlling an oscillation energy circuit. The second primary winding
path (8) and the feed-back winding (16) are geometrically arranged laterally on the
transformer core (9) in relation to the primary winding.
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